Ipposnif functions are Sql Server functions dedicated to the exchange markets betting.
To call them from a strategy it is needed to specify the schema owner, in our case it is always dbo. So for example a call to a function could be:

dbo.fn_raceproperty(@id_race, 'overround_back') 
You can read and modify these sql functions from the Ipposnif database; they are distinguished by the internal system functions by the first three characters of the name, that are "fn_".